Experimental study on the effect of deflectors on sediment removal efficiency of a deep-depth vortex chamber type sediment extractor

Chyan Deng Jan, Yu Chao Hsu, Cheng Han Lin, Yi Chao Zeng

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigates the effects of horizontal deflectors on the sediment removal efficiency of a deep-depth vortex chamber type sediment extractor. The vortex chamber used in this study has a total height of 115.0 cm and an internal diameter of 48.0 cm. The arrangement of deflectors in experiments includes no deflector, one deflector, two deflectors and three deflectors. The inflow sediment concentrations are between 35.0 g/L and 45.0 g/L. The median diameter (d 50) of the sediment used in experiments is 3.69 × 10-3 mm. An experimental result shows that the deep-depth vortex chamber type sediment extractor installed with three deflectors, the overflow sediment concentration is 0.37 g/L and its corresponding sediment removal efficiency is 98.9%. Comparisons of experi-mental results under different arrangements of deflectors show that the overflow sediment concentration in experiments with three deflectors is about 26.0%~56.0% lower than that with two deflectors, 63.0%~79.2% lower than that with one deflector, and 78.5% lower than that without deflector. The experimental results indicate that the deflectors installed in the deep-depth vortex chamber type sediment extractor is helpful for removing fine sediment particles from sediment-water mixtures, and the device with three deflectors has better sediment removal efficiency.

Original languageEnglish
Pages (from-to)84-96
Number of pages13
JournalJournal of Taiwan Agricultural Engineering
Volume57
Issue number4
Publication statusPublished - 2011 Dec 1

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)
  • Engineering(all)

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